let open = document.querySelector(".close");
let close = document.querySelector(".open");
let btn = document.querySelector('.btn')
let container = document.querySelector('.container')
let ul = document.querySelector('ul')

open.onclick = function (e) {
    btn.classList.remove("return-active");
    container.classList.remove("container-active2");
    container.classList.add("container-active");
    btn.classList.add('active')
    ul.classList.add('ul-active')
}

close.onclick = function (e) {
    btn.classList.remove("active");
    container.classList.remove("container-active");
    container.classList.add("container-active2");
    btn.classList.add('return-active')
    ul.classList.remove('ul-active')
};